Friction driving mechanism



May 15, 1928.

J. DERRY ,FRICTION DRIVING MEHANISM Filed Feb.1. 1926 "F'l E NQENVEW Patented May 15, 1928.

1,569,553 PATENT OFFICE.

JASPEB-DERRY, OF MEDFORD, MASSACHUSETTS, ASSIGNOR TO ANDREW TERKELSEN,

OF BOSTON, MASSACHUSETTS.

FRICTION DRIVING MECHANISM.

Application led February 1, 1926. S.eria1rNo.l8r5,184.

This invention relates to tension mechanism for friction driving and driven members or rollers and the invention is particularly, although not exclusively, adapted for use in connection with friction driving and supporting mechanism for annular shuttles in wrapping machines, such for example as tire wrapping machines as herein illustrated.

Heretofore where, for instance, the annular shuttle of the wrapping machine has .rollers resulted in the development of considerable heat, expanding the cooperating surfaces of metal or other material to such an extent as to result in binding and a rapid wearing away of the surfaces,

An object of the' present invention is to eliminate the foregoing disadvantages and to provide a more eiiicient friction drive between driving and driven members in which these members are constructed to yield with relation to one another as a result o-f which compensation for wear vis provided, and undue friction between the metal surfaces cauing them to heat up and bind is obviate Other objects of the invention will appearin the following description and appended claims, reference being had to the laccompanying' drawings forming a part of this specification vwherein like reference characters designate corresponding parts in the-several views, and wherein: f F'g. l is a side elevation ofa tire wrap ping machine embodying my invention.

Fig. 2 is a detail fragmentary view showing the manner of supporting kone of the rollers. l

Fig. 3 is a sectional view taken substantially on lines 3-3 of Fig. 1 looking in the direction of the arrows. y

Before explaining in detail the present 'improvement and mode of operation thereof, I `desire to have it understood that the invention is not limitedl tothe details of construction and arrangement of parts which are illustrated in the accompanying drawings, since the invention is capable of other embodiments, and that the phraseology which I employ is` for the purpose of description and not of limitation. y

While the nveznten may be etherwiae ployed it is shown by way of example in F ig. 1 as applied to a machine for wrapping automobile tires with helical windings of a. strip of paper. As shown, the'frame ofithe machine comprises a suitablebase 20`rising from which is an upright 20 to which is pivoted a yoke 21 having an open top, and carrying a circular series of rollers 22, 23, 24, 25 and 26 for rotatably supporting l an annular shuttle 27 formed with an opening 28 adapted to register with .the open top of the yoke in order to permit insertion of the tire or other work W.l Said tire 'W is supported with its lowermost portion centered with respect to the shuttle 27 by means of apair of work supporting and rotating yrollers one of whichv is shown at v29, each roller being carried by a shaft 30, journalled in suitable bearings in an upright 20b and having driving connections partly indicated at 31 whereby the tire is ro-tated from the shaft 35al of an electric motor 35. The shuttle 27 and work supporting rollers 29are, connected for simultaneous rotation in synchronism, ythe-arrangement being, such that the work W is turned relatively slowly with 'respect to the shuttle 27. The rollers 25 and 26 not only.y support the shuttle but also drive the same, being engaged and rotated by a fricton disk 33 rotatably supported on a shaft 32 and in turnvengaged and rotated by a friction pinion 34.011 the shaft 35a of the electric motor, the latter being carried by a frame 36 adapted to be raised and lowered, to engage the pinion 34.. with the disk 33 and vdisengage the same therefrom` by means of a suitable tread operated lever (not shown). The Vyoke 21 may be adjusted about the fixed axis of the shaft 32'to center lthe shuttle 27 with respect to tires of different sizes, as is lusual in machines of the type illustrated.

The wrapping material, herein illustrated as a strip S, is-supplied from a roll `38 rotatably supported on the shuttle 27 and the leo struction thereof' being shown in Fig. 3, and hence adetail description of the eccentric mounting for one roller suiiices for all.v Rotatably mounted in the supporting'yoke 21 isla shortishaftlterminating at' one end in a crank or eccentric portion 41 carrying an antifriction bearing 42 `for the roller (or a roller23, 24, 25 or 26). This roller is free to rotate relatively to the eccentric 4l and is held imposition against the yoke inea-ns. of a `screw 44 havinga head 44.a which engages the bearingr 42, `the latter liereceived betivieencollars 48 forming temine. thc eccentric 4l cnil Shi-flics `tlljc i llcfcrrcs tc `Flec-` lcncl 2., it Will lic ciccn ,thcgtriin thc pr-cscct instance .thc rellcrcvll,

` 2,3 and 24 are idlers Yor shuttle supporting lellcl cclttcrine rcllcrc `The Teller lic .tlc-

Sie-ccd .fcc manual .adjustment in. crclcl tc vves tlc-cctc thc camewllcrl thc machine is .Set up, ne Subsequent. adjustments' rcctccpt tc.l t ccm.- pencatc fcr` t Wett? being. tlictcciler .utliclly ncessiter! i .The eccentric. Alct this rlcllcl .ish held nratljcctcd .petition as. by rectas cf .e cet. ccrcv `The .tener Yends the] .operating @uns flaca .the shafts 4919i clic Ircllcc.S 22 and 2.3 are, however, ccrlncctccl tcsctliger by recalls. cl a .rigid linkt?, and 'a tcecice Sitting 481s. .Secured ct ceccefl tc c Scl-lclilc .Stud 48* vceri-lcd by tlic: vyckcV 2l and at .ils .cppcste end is connected ntelt rc .pivct .ccnnectlng thc link fl?. and creatine ccm 45- F thiscODSftrulotion` it 'xvil liefseen .that thc toccati-'icc which .Sepp-crt the. tellers 22 vsind 2.3 are ccmlcctccl bymccec cf. thc rigid flink 47 ttyl are .beth-yielding@ cctltlcllcfl tltrccgh `tllc medium cf thc-.Sitting 48. The tellers 2,5 .twcl` in. tltc Prc l nt instance .constitute timing Wcll ing arldrccppcltiee rcllcrs., anflftlic cn-circa ing. arms 4G fcc thctllcftc 40er-.cn which tllcac rcllcrs arc mounted a 'c connected teu gether bymeans vof a spiral tension la thee cratcn ...cf `tlic mcchaecrl; the tcmlclcy ctllc citrine 48. tc. twins beth .4.5 downwardly@ andthenccitlcnfei tlic ,eccelblllcs4l for the rollers 22and 23is such that. this t clcwmtard `.nieve.merit cf.- larrris 45 will result .itl farcies thc Ilcllfcrc 22cm@ 25" ylelflinsly aecnct the cllcttlc A27 .tliccliy .tcllfllllg tc. bcdlly lmcyc4 the Shuttle'. t0 the right in Fig. l; The directionu of these .fcrccc .schcyyt -lcy .lince cc .cada .in Fie;- .-1, which. {ccnyccgc tcwcrclthe center.. .Z .cf thc shuttle .Tlc pcttlce cf. thc lal.:.citricc 4.1

said.slmttlclccccntncs which said rp.

for the rollers and 2Q. ,is `such that these `rollers will be forced yieldingly in the d1- Y rection of the driving disk 33 through the action of the spring 49. The direction of these `forces is shown bylines mand# n which converge toward the center Q, of disk 33.

Tlius it Will be seen that the normal ae- "tion ofthe spring 48 is to urge the rollers and 23 in the saine direction as the direction in which t e spring 49 urges the miles 2.5.2111@ 2c. The. chtite. und@ the ycltllce plcccetc cf thc l'cllcrc 22 .and is` forcedfor nrgegl :laterally arrainstrollerg;

.25 and26 which in turn yiel on tlieirec.-

. tica Y is` .ctlf-cpcccatcdl fcc .by thcyleldlce t.

nioveinent of the rollers against theaction of springs. 48 and .49 southatat all times thc Prcpcrplcssurcs exerted .by the rollers cgccct thc Shuttle necessary. for satisfec- .tory and' ellccnt operation. t@tall times...

It will ,lic .Sccn thttthc crm l5 ccmlccttd tc the ccccattic which Scraper-ts rcllcr 22.18

rigidly cccccctcd by. lielt .47 .tc @thc farm connected to the. .ecc-enit@ @for .thcmller 2.3. This ccnctructce etcycts tlic I.carer rcllcr 22. freni mcyll nyyar.

ly. when" the Vcpce- T cylcltlnsmcycmcct t tlickrkcllcr. thctcfcrc ccntlcllcd in .acccrtlaecc with .the ylclfltc mcyemcnt cl the lcwcc ccllci :ilrsc that v cntlic caching `28.1% cppestlc ,the

rlcllcr .22 f thc latter cannet merc` inwardly tc calice tllccnd cfctllc .Sliltttlcfean .tc Strkc the roller, since at such time the lower roller will lccln -caec .calf-et with .thcr .Shuttle thereby. hcllllngl, t

l Nie. sach. .prcylslcn rcl .'11 Casati thc izcllcrc 2,5. and 2.6

liv ,ich ccc yield ngly .held againshiliemntinuous or nn; disk Bt .shuttlellcyieccacpealce 11i itcrclty cry pair cf rc1. .cracngcgmg thc periphery et eetl .Shuttles cnil means `lorA rcsileetly "uref ,111s Scld rcllccc. toward said shuttle". and

cette `iler` ngtlly ,connecting said rollers fcc etcycmcet le crescet Shittlcfiletting an @cette .1 lts pcrlphecy, c Pclr cf rcllcrscegcslegt ,c perphcr of `ers @upper lcllel" 22 .in .ptcpcc pcelticeiylth .respect tcl tlitpcmeliery ictthc Shuttle `.q ined los lis.-

2.. cccmblectlcn cit c; rctclryannule are mounted, a link connecting said eccentries for movement in unison, and a spring acting on said eccentrics in the direction to urge said rollers toward said shuttle.

3. The combination of an annular shuttle, two oppositely located sets of rollers engaging the periphery of the shuttle, a driving member for frictionally driving one set of rollers, and spring controlled means for urging each set of rollers toward said driving member.

4. The combination of an annular shuttle, two oppositely located sets of rollers engaging the periphery of the shuttle, a driving member :for frictionally driving one set of rollers, and spring controlled means for urging each set of rollers toward said driving member, said means comprising a movable eccentric for supporting each roller and a spring connected to the eccentric of each set of rollers.

5. The combination of a rotatable annular shuttle having an opening at the periphery to permit insertion of an article to be wrapped, two oppositely located pairs of rollers engaging the periphery of ythe shuttle, a movable eccentric for rotatably supporting each roller, a swinging arm connected to each eccentric, a rigid spring controlled link connecting one pair of eccentrics, and a spring connecting the other pair of eccentrics.

6. The combination of a rotary shuttle, said shuttle having a peripheral substantially V-shaped groove, two oppositely located sets of rollers having peripheries formed to enter and substantially fit said groove, a driving member for frictionally driving one set of rollers, and spring controlled mechanism for yieldingly urging each set of rollers toward said driving member.

In testimony whereof I ax my signature;

JASPER DERRY. 

